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Commit 0135bfa8 authored by Ram Chandrasekar's avatar Ram Chandrasekar
Browse files

msm: limits: lmh_lite: Add limits management hardware driver 



Add a driver to interact with the limits management hardware
lite (LMH-lite).

This driver provides API, which will interact with the trustzone
for getting details like the,
1. sensors supported by the LMH
2. sensors throttling intensity
3. various operating profiles

The driver also provides API for changing the LMH operating profile
and to enable or disable hardware event logs.

The driver handles the interrupt from the LMH-Lite hardware and
notifies the LMH ISR framework. The LMH ISR framework monitors the
throttling intensity of the sensors and then re-arms the interrupt
when the throttling intensities of all the sensors are zero.

CRs-Fixed: 704088
CRs-Fixed: 698387
Change-Id: I9eafb572c4a2a2d89ea55baa4eef23d592d32170
Signed-off-by: default avatarRam Chandrasekar <rkumbako@codeaurora.org>
parent d77da280

Documentation/devicetree/bindings/arm/msm/limits_lmh.txt

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Limits Mangement Hardware driver

================================

LMH driver provides API to interact with the LMH hardware. All the calls to

the LMH hardware are routed via secure space.



The device tree parameters for LMH driver are:



Required parameters:

- compatible:	Must be "qcom,lmh"



- interrupts : LMH Lite hardware interrupt details.

- reg : Base address of the LMH Lite hardwares interrupt status register

		and its size in bytes.

- qcom,lmh-trim-err-offset : This property defines the bit in the LMH

		interrupt status register, which shows whether there is a

		trim error in LMH hardware.



Example:



qcom,lmh {

	compatible = "qcom,lmh";

	interrupts = <0 332 4>;

	reg = <0xF9117000 0x4>;

	qcom,lmh-trim-err-offset = <18>;

};

drivers/thermal/Kconfig

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@@ -109,6 +109,15 @@ config LIMITS_MONITOR 
	  Limits hardware's monitoring entities as sensors with the thermal

	  Limits hardware's monitoring entities as sensors with the thermal

	  framework.

	  framework.





config LIMITS_LITE_HW

	bool "LMH Lite hardware driver"

	depends on LIMITS_MONITOR

	help

	 Enable this option for interacting with LMH Lite hardware. This

	 implements the APIs required for getting the details about sensors

	 supported by LMH Lite, their throttling intensity and the operating

	 profiles.



config THERMAL_MONITOR

config THERMAL_MONITOR

	bool "Monitor thermal state and limit CPU Frequency"

	bool "Monitor thermal state and limit CPU Frequency"

	depends on THERMAL_TSENS8960 || THERMAL_TSENS8974

	depends on THERMAL_TSENS8960 || THERMAL_TSENS8974

drivers/thermal/Makefile

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@@ -28,3 +28,4 @@ obj-$(CONFIG_THERMAL_QPNP) += qpnp-temp-alarm.o 
obj-$(CONFIG_THERMAL_QPNP_ADC_TM)	+= qpnp-adc-tm.o

obj-$(CONFIG_THERMAL_QPNP_ADC_TM)	+= qpnp-adc-tm.o

obj-$(CONFIG_THERMAL_MONITOR)	+= msm_thermal.o msm_thermal-dev.o

obj-$(CONFIG_THERMAL_MONITOR)	+= msm_thermal.o msm_thermal-dev.o

obj-$(CONFIG_LIMITS_MONITOR)	+= lmh_interface.o

obj-$(CONFIG_LIMITS_MONITOR)	+= lmh_interface.o

obj-$(CONFIG_LIMITS_LITE_HW)	+= lmh_lite.o

drivers/thermal/lmh_lite.c

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File added.

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